Black BLK-CPT235VH Specifikace

CCTV VIDEO TRAINING MANUAL Someone once said, "Knowledge is the key to success". This rule also applies to the installati

HOW TO SHOOT A LICENSE PLATE WITH A CCTV CAMERA. When your customer asks you to set up a camera to grab a shot of a license plate on a car, here ar

This darkening effect is caused by the auto iris in the camera. When it sees the bright hot refection or headlights, the iris in the camera will close

HOW TO MEASURE CCTV CAMERA OUTPUT IMPEDANCE. The vast majority of coaxial cables are either 50 Ohm or 75 Ohm Characteristic Impedance. This Charact

The key idea here is that such intermittent or failed conditions are caused by a CCTV camera with a zero output impedance, not a failure in the Pan

DIGITAL VIDEO RECORDER PROBLEM SOLVING. The new digital revolution has brought us many new and exciting products for the CCTV industry. The DIGITAL

The amount of headroom varies from one manufacturer to another, so you may discover one brand works better than another under certain circumstances,

GB-60 GROUND LOOP BLOCKER AMPLIFIER HOW TO PREVENT LIGHTNING DAMAGE IN CCTV. Protecting a CCTV system and it components from lightning damage does

Lighting Protection in the form of diode and gas tube lighting suppressors need to be installed at one end and maybe both ends of any long cable run.

This ground loop is created by the normal ground at the DVR or Monitor and the new ground applied by the lightning arrestors. This will look like blac

This 60 cycle line frequency is the common reference used to lock the cameras together. For this reason only AC powered camera's have the Line-

Table of Contents VIDEO LEVELS. 1 HOW SYNC PULSE AMPLITUDE EFFECTS CCTV INSTALLATIONS. 1 WHITE LEVEL IRIS SETTING, HOW MUCH IS ENOUGH?

In commercial buildings the utility power is Three Phase, that is three separate 60 cycle lines whose phase is 120 degrees apart. Moving the power l

CCTV UPS TROUBLE SHOOTING TIPS. Many CCTV Closed Circuit Television systems use a UPS Un-interruptible Power Supply to provide guaranteed continuou

The “square-wave” type of UPS will put out the same 60Hertz frequency but its output waveform is that of a square-wave. A 60Hertz square-wave signal

TROUBLE SHOOTING. To begin trouble shooting you must first identify the source of the interference. First disconnect the suspected UPS and turn it

The term, Lines of Definition actually refers to the number of times the picture screen can be modulated (made lighter and darker) across the screen.

If it is a Tape Recorder, old or worn tape will play back fewer "Lines" than new tape. Even new tape of different types may show variation

Even greater distances of 8000' or even 12000' can be equalized by adding intermediate "booster" amplifiers and equalizers. These

Using the VLTG-800 Video Line Test Generator as a test signal source and the CM-1 Camera Master as the picture quality measurement system enables a sp

HOW FIBER SYSTEMS WORK: To understand the problem it will help you to know how a video fiber optic transmitter and receiver work. When you connect yo

If the input video signal deviates from the established standards, the tip of white clamp will change the relationships within the video signal accord

VIDEO LEVELS. To discuss video let's start with the unit of measure, the I.R.E. unit. I.R.E. stands for Institute of Radio Engineers, this re

There is another condition that can occur that will have devastating effects on a fiber systems output. This problem is one that affects older establi

If you set the iris for more than 100 I.R.E. units, the picture can be washed out causing loss of picture definition. Some cameras can be set to 120

Proper termination can be checked by measuring the SYNC pulse amplitude anywhere in the video cable. It should read 40 I.R.E. with the termination O

Here is how the 60 cycle bar gets into your video picture. If you connect a coaxial cable to a monitor or other equipment that plugs into the 60 cyc

These transformers must be installed at the coaxial cable that is originating the 60 cycle bar problem. Isolation transformers only work when they c

DEPTH OF FIELD, WHAT IS IT? All lenses have a characteristic called Depth of Field. Depth of Field is a zone in front of the lens that is in focus.

Hand held focus meters such as the CM-2 Camera Master are also useful in determining the maximum focus of any scene. They are more accurate than lar